Zygomatic implants in intra-sinus versus extra-maxillary approaches for prosthetic rehabilitation in severely atrophic maxillae. Finite element analysis

Objetive: To compare the stresses and deformations generated on surrounding bone of zygomatic implants when using an intra sinusal extra-maxillary approach, through finite element method. Material Methods: Computer aided designs (CADs) were constructed SolidWorks Software a skull with resorption to be rehabilitated fixed hybrid prosthesis two conventional straight implants. For boundary conditions (load conditions), symmetry in sagittal plane was assumed that all materials isotropic, homogeneous linearly elastic. Two implantation techniques simulated: (Is) extra maxillary (Em). Vertical lateral loads 150 N 50 applied models obtain Von Mises equivalent stress strain (displacement). Results: The average measurement (MPa) recorded as follows: Approach implant body (Is: 0.24- Em: 0.28,) effort vertical load: Is: 0.69 - 0.96; peri-implant surface under horizontal 2.11 0.94. Average displacement load 0.35 0.40, 1.34 2.04. total deformation approach 2.23 mm 0.80mm, 0.14 0.21. Conclusion: results this study indicate despite differences occurred both (displacement) between intra-sinus approaches, static strength bone, which is approximately MPa tension 250 compression not exceeded. Considering limitations analysis, there seems no biomechanical reason choose one over other.